1. 11 Feb, 2019 13 commits
  2. 09 Feb, 2019 3 commits
    • Raju Rangoju's avatar
      iw_cxgb4: fix srqidx leak during connection abort · f368ff18
      Raju Rangoju authored
      When an application aborts the connection by moving QP from RTS to ERROR,
      then iw_cxgb4's modify_rc_qp() RTS->ERROR logic sets the
      *srqidxp to 0 via t4_set_wq_in_error(&qhp->wq, 0), and aborts the
      connection by calling c4iw_ep_disconnect().
      
      c4iw_ep_disconnect() does the following:
       1. sends up a close_complete_upcall(ep, -ECONNRESET) to libcxgb4.
       2. sends abort request CPL to hw.
      
      But, since the close_complete_upcall() is sent before sending the
      ABORT_REQ to hw, libcxgb4 would fail to release the srqidx if the
      connection holds one. Because, the srqidx is passed up to libcxgb4 only
      after corresponding ABORT_RPL is processed by kernel in abort_rpl().
      
      This patch handle the corner-case by moving the call to
      close_complete_upcall() from c4iw_ep_disconnect() to abort_rpl().  So that
      libcxgb4 is notified about the -ECONNRESET only after abort_rpl(), and
      libcxgb4 can relinquish the srqidx properly.
      Signed-off-by: default avatarRaju Rangoju <rajur@chelsio.com>
      Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      f368ff18
    • Raju Rangoju's avatar
      iw_cxgb4: complete the cached SRQ buffers · 11a27e21
      Raju Rangoju authored
      If TP fetches an SRQ buffer but ends up not using it before the connection
      is aborted, then it passes the index of that SRQ buffer to the host in
      ABORT_REQ_RSS or ABORT_RPL CPL message.
      
      But, if the srqidx field is zero in the received ABORT_RPL or
      ABORT_REQ_RSS CPL, then we need to read the tcb.rq_start field to see if
      it really did have an RQE cached. This works around a case where HW does
      not include the srqidx in the ABORT_RPL/ABORT_REQ_RSS CPL.
      
      The final value of rq_start is the one present in TCB with the
      TF_RX_PDU_OUT bit cleared. So, we need to read the TCB, examine the
      TF_RX_PDU_OUT (bit 49 of t_flags) in order to determine if there's a rx
      PDU feedback event pending.
      Signed-off-by: default avatarRaju Rangoju <rajur@chelsio.com>
      Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      11a27e21
    • Raju Rangoju's avatar
      cxgb4: add tcb flags and tcb rpl struct · e381a1cb
      Raju Rangoju authored
      This patch adds the tcb flags and structures needed for querying tcb
      information.
      Signed-off-by: default avatarRaju Rangoju <rajur@chelsio.com>
      Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      e381a1cb
  3. 08 Feb, 2019 21 commits
  4. 07 Feb, 2019 3 commits